A Unique Euplotid Ciliate, Gastrocirrhus (Protozoa, Ciliophora): Assessment of Its Phylogenetic Position Inferred from the Small Subunit rRNA Gene Sequence

  title={A Unique Euplotid Ciliate, Gastrocirrhus (Protozoa, Ciliophora): Assessment of Its Phylogenetic Position Inferred from the Small Subunit rRNA Gene Sequence},
  author={Miao Miao and Weibo Song and Zigui Chen and KHALED A. S. AL‐RASHEID and Chen Shao and Jiamei Jiang and Wenbo Guo},
  journal={Journal of Eukaryotic Microbiology},
ABSTRACT. The morphologically unique genus Gastrocirrhus has been considered a distinct but systematically uncertain euplotid due to the absence of both morphogenetic and molecular information. Based on the small subunit rRNA gene sequence, the phylogenetic position of Gastrocirrhus monilifer Ozaki & Yagui, 1942 was re‐addressed using multiple algorithms (neighbor‐joining, maximum parsimony, least‐squares, and Bayesian inference methods). Results indicate that: (1) all phylogenetic trees using… 

Phylogenetic relationships within the genus Aspidisca (Protozoa, Ciliophora, Euplotida) revealed by ITS1-5.8S-ITS2 region sequences

The internal transcribed spacer regions (ITS1 and ITS2) and 5.8S rRNA genes were sequenced in six populations of four Aspidisca species and revealed different topologies of inter-species, inter-genera and inter-subclasses.

Phylogenetic position of the freshwater ciliate Euplotes daidaleos within the family of Euplotidae, obtained from small subunit rDNA gene sequence

The small subunit of the nuclear ribosomal operon (SSU rDNA) is sequenced and compared with others of 40 taxa of different Euplotes species and six, well-supported clades and two single taxa are determined.

Further Consideration of the Phylogeny of Some “Traditional” Heterotrichs (Protista, Ciliophora) of Uncertain Affinities, Based on New Sequences of the Small Subunit rRNA Gene

ABSTRACT. The systematic relationships and taxonomic positions of the traditional heterotrich genera Condylostentor, Climacostomum, Fabrea, Folliculina, Peritromus, and Condylostoma, as well as the

Phylogenetic Analyses Suggest That Psammomitra (Ciliophora, Urostylida) Should Represent an Urostylid Family, Based On Small Subunit rRNA and Alpha-Tubulin Gene Sequence Information

The morphologically unique ciliate Psammomitra has long been considered as a systematically uncertain stichotrich but the improved diagnosis for this family is as follows: Urostylida possessing extremely contractile, elongated body.

Caryotricha minuta (Xu et al., 2008) nov. comb., a unique marine ciliate (Protista, Ciliophora, Spirotrichea), with phylogenetic analysis of the ambiguous genus Caryotricha inferred from the small-subunit rRNA gene sequence.

The results strongly support the distinct separation of the Kiitricha-Caryotricha clade, which always branches basal to the Stichotricho-Hypotrichia-Oligotrichio-Choreotrichi assemblage, and confirm the previous hypothesis that the KiItricha -CaryOTricha group represents a taxon at subclass level within the spirotrichs.

A New Genus of Marine Scuticociliate (Protozoa, Ciliophora) from Northern China, with a Brief Note on Its Phylogenetic Position Inferred from Small Subunit Ribosomal DNA Sequence Data

Phylogenetic analyses indicate that Wilbertia groups with Eurystomatella sinica forming a branch that diverges at a deep level from all other pleuronematid scuticociliates, which is closely related to the well‐known Cyclidiidae.

Description of the Rare Marine Ciliate, Uronychia multicirrus Song, 1997 (Ciliophora; Euplotida) based on Morphology, Morphogenesis and SS rRNA Gene Sequence

A population of the marine euplotid ciliate, Uronychia multicirrus, found in the littoral zone of the Daya Bay, Guangdong, South China, was investigated using live observation and protargol impregnation method to diagnose this species by possessing a long row of ventral cirri, which has never been seen in all other known congeners.

Morphological, Ultrastructural, and Molecular Characterization of Euplotidium rosati n. sp. (Ciliophora, Euplotida) from Guam

A ciliate species collected from shallow reefs in Guam, grown, and maintained in the laboratory, and compared with established species of the genus Euplotidium is established that has a cirral pattern composed of 12 frontoventral and six transverse cirri, and lacks the left marginal cirrus.



Phylogenetic positions of Aspidisca steini and Euplotes vannus within the order Euplotida (Hypotrichia: Ciliophora) inferred from complete small subunit ribosomal RNA gene sequences

The phylogenetic trees further suggest the postulated relationships among families within the order Euplotida that Uronychia and Diophrys, which were usually placed in the family UronYchiidae, branch later and share closer relationship each other than they are to other euplotids.

The Order Euplotida (Ciliophora): Taxonomy, with Division of Euplotes into Several Genera

A review of variability of ciliation and nuclei among the 14 genera suggests that lines of evolution may have involved both the loss of cirri and nuclear simplification in the order Euplotida.

Phylogenetic positions of Uronychia transfuga and Diophrys appendiculata (Euplotida, Hypotrichia, Ciliophora) within hypotrichous ciliates inferred from the small subunit ribosomal RNA gene sequences

The small subunit rRNA (SSrRNA) genes were sequenced for the hypotrichous ciliates Diophrys appendiculata and Uronychia transfuga . These two genera branch one after the other above Euplotes on

Phylogenetic relationships within the class Spirotrichea (Ciliophora) inferred from small subunit rRNA gene sequences.

The molecular data support the morphological and ontogenetic evidence that the pattern of 18 frontal-ventral-transversal cirri evolved in the stemline of the Oxytrichidae and was modified several times independently.

Considerations on the systematic position of Uronychia and related euplotids based on the data of ontogeny and 18S rRNA gene sequence analyses, with morphogenetic redescription of Uronychia setigera Calkins, 1902 [Ciliophora: Euplotida]

The results indicate that the traditional order Euplotida might comprise 3 paraphyletic groups: the eueuplotids, i.e. euplotid genera with a 5-cirral anlagen mode and a subcortical origin of the oral primordium during morphogenesis, gastrocirrhids and discocephalids, the last of which is possibly a convergent lineage.

Morphology and Infraciliature of a New Marine Ciliate Euplotidium smalli n. sp. with Description of a New Genus, Paraeuplotidium n. g. (Ciliophora, Euplotida)

An improved generic diagnosis of Euplotidium is suggested based on morphology and infraciliature characters: marine hypotrichs with a funnel-shaped buccal cavity; with frontoventral and transverse cirri; neither left marginal cirrus nor caudal cirri present.

Phylogenetic relationships among 28 spirotrichous ciliates documented by rDNA.